<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>css-notes</title>
  <style type="text/css">
    h1 { letter-spacing: -0.5em }
    h4 { letter-spacing: 20px }
  </style>
</head>
<body>
<h1>This is header 1</h1>
<h4>This is header 4</h4>
</body>
</html>
